Bushing extracting and inserting tool



Patented Jan. 19, 1937 UNITED STATES BUSHING EXTRACTING AND INSERTINGTOOL Myron A. Hamman, Chicago, Ill.

Application August 7, 1935, Serial No. 35,113

Claims.

The invention relates to improvements in a screw press particularlyadapted for extracting and inserting such articles as bearings,bushings, and the like. In this instance, however, the inventioncontemplates a device or tool with which to perform the above mentionedoperations quite readily and effectively by hand.

The invention further contemplates a tool, having the above statedcharacteristics, being comparatively of light weight but so constructedas to withstand long and hard usage.

It is further contemplated to provide a tool, having the above statedcharacteristics, which may be constructed of, comparatively, few partswith which to extract and insert various size articles of the abovedescription with the least possible trouble and expense.

The invention further provides a device of the above type which may bemanufactured and marketed at, comparatively, a very small cost.

These and other objects of the invention will be better understood byreferring to the illustrations of the accompanying drawing, more fullydescribed in the following specification, and more particularly pointedout in the appended claims.

In the illustrations, Figure 1 is, substantially, a longitudinalsectional view showing the improvements embodied inthe invention, andshows a bearing bushing about to be extracted from its place ofinstallation to the position shown in light dotted lines, or afterhaving been inserted in place.

Figure 2 is a similar sectional view of part of the invention shown inFigure 1, and shows the tool in position for inserting a bearingbushing; and,

Figure 3 is a sectional view, on a smaller scale, taken on the plane 33,of Figure 1.

Similar characters refer to similar parts throughout the several views.

To illustrate the invention I have shown on the drawing a jack screwholder or screw threaded nut 50, the same being, preferably, hexagonalin cross section, and having screw threads H, formed partiallytherethrough, the same being adapted to receive corresponding screwthreads H, of a forcing member or jack screw 12. The screw I 2, isprovided with a suitable bore l2, through which a draw bar or pull rodI4, is guided. Through a wall 19, formed at one end of holder I9, isformed, in this instance, a square opening 13, through which is workablyfitted a square portion 14', of rod M; the rod l4, being turned round,as at l5, and provided with screw threads 16, over which is fitted'adouble shouldered reversible adapter l1, having both itsends tapped withscrew threads ll, to correspond with those formed on rod M. The adapterI1,

is adapted to engage a bearing bushing I3, for 5 either its removal orinsertion, substantially as shown in Figures 1 and 2. 7

At the end IQ, of holder i0, is provided a counterbore 20, into which issnugly fitted a tubular thrust member 2!, the same being adapted to 10receive an ejected bearing as indicated by-light dotted lines in Figure1.

Referring to Figure 1, it will be seen that jack screw 52, is providedwith an enlarged portion or head 22, the same being provided with acounterbore 23, which is adapted to receive a suitable thrust bearing24. The thrust bearing 24, is adapted to fit over rod I4, and betweenthe bottom of counterbore 23, and the shoulder formed by the enlargedportion or head 25, provided on the end of rod M, as indicated inFigure 1. Radially out from head 22, and in opposite relation to eachother, are arranged a pair of lever arms 26.

On desiring to remove a bushing or bearing 5 from its place ofinstallation or bearing hub 21, rod l4, minus adapter I1, is insertedthrough the bushing i 8, to the extent that member 2|, engages the faceof hub 21, and to the extent that portion 16, of rod It, extends outbeyond the bushing as shown. The partsbeing in the position statedadapter H, may now be threaded over portion IE, to the extent that itsnugly engages and firmly clamps bearing and hub and part 2!, together,whence the whole, that is the 5 tool, together with the part upon whichhub 27, is formed, may be placed in a vice and there securely heldbetween vice-jaws, being indicated by light dotted lines 28, as shown inboth Figures 1 and 2. 4

The tool being in the position stated, and the several parts beingarranged as described, the bushing 18, may be readily withdrawn orejected from its secured position simply by unscrewing jack-screw 12,from its holder ID, the operation of which, by means of levers 26,engages the head 25, of rod '14, through the medium of thrust bearing24, thereby forcing rod M, to draw adapter I 1, against the bushingforcing the same out from its bore to the position shown by light dottedlines in Figure 1.

It may be stated, that owing to the fact that rod I4, is square, and isguided through a corresponding square opening [3, in holder II), it willnot turn when ejecting or inserting a bushing,

therefore, there is no danger of adapter H, being deranged whileperforming the operation of removing or inserting a bushing.

It may be further stated, that the operation of inserting a bushing issubstantially identical with that of removing or ejecting a bushing.

Having thus described the invention it can be readily understood thatthe minor details of its construction may be altered in several wayswithout departing from the spirit and scope of the invention, andwithout losing any of its attendant advantages. Therefore, what isclaimed is desired to be secured by Letters Patent.

I claim:

1. In a tool, of the character described, a jackscrew holder, a jackscrew workable through said holder, a square draw rod or spline operableby means of said screw and slidably mounted in a central correspondingsquare opening provided in said holder, a bushing ejecting or insertingreversible adapter detachably securable to one or free end of said rod,a thrust member carried by said holder, a thrust bearing interposed between said screw and a shoulder formed on one end of said rod, andjack-screw operating handles suitably fastened in said screw.

2. In a tool, of the character described, a jackscrew holder, ajack-screw workable through said holder, a square rod for extracting orinserting bearing bushings and the like slidably mounted forlongitudinal movement through said holder, said rod having a shoulderformed at one of its ends and the opposite end thereof being providedwith screw threads, a thrust bearing interposed between said shoulderand the said jack-screw, a reversible or double-ended bushing ejectingor inserting adapter having its opposite ends tapped to receive thescrew threaded end of said rod, and operating handles or levers securedin said jack-screw.

3. A tool, of the character described, having a draw bar and ajack-screw for operating said bar, said bar being formed square, one endthereof being turned round and having screw threads formed thereon, theopposite end being enlarged to form a head providing a shoulder, athrust bearing arranged over said bar intermediate said shoulder and thesaid jack-screw,

said screw being adapted to workably fit over the square portion of saidbar and form a bearing therefor, a holder or mounting having a screwthreaded bore, said screw being adapted to workably fit said bore, and asquare opening formed in said holder, the said opening being adapted toform a guide or key-way through which'the square portion of said bar mayslide and be prevented from turning.

4. A tool, of the character described, having a jack-screw and a holderin which to operate said screw, a wall formed in one end of the holderhaving an axial square opening formed there-through, said screw having aconcentric circular bore formed there-through, said screw being enlargedat one end to form a head portion, a counter-bore formed in said portionconcentric to said bore the bottom of which forming a shoulder, a thrustbearing adapted to fit in said counter-bore and against said shoulder, asquare draw bar having a shoulder formed at its one end adapted to fitagainst said bearing, the said bar being adapted to slidably operatethrough said square opening, said circular bore being adapted toworkably fit said draw bar, and hand levers suitably secured in saidhead portion.

5. A tool, of the character described, having a jack-screw holder, saidholder being provided with a screw-threaded bore, a jack-screw adaptedto workably fit the screw threads of said bore, said jack-screw having acounter-bore formed concentrically in its outer end the bot tom of thecounter-bore forming a shoulder, a wall formed in said holder, said Wallhaving a square opening formed axially there-through, a concentriccounter-bore formed in the end of said holder, said counter-bore beingadapted to receive a tubular thrust member, said square opening beingadapted to form a guide for the square portion of a draw-bar movablymounted therein, a draw-bar having a portion thereof formed square thesame being adapted to slidably fit said square opening, an enlargementformed on one end of said bar providing a shoulder, and a thrust bearingloosely mounted over said bar intermediate the said shoulders.

MYRON A. HAMMAN.

